DE2131574A1 - Character distribution system for lighting - Google Patents

Description

Dr. Hans-Heinrieh Willrath ο - 62 Wiesbaden June 22, 1971

Dr. Dieter Weber 2131574 Postfa * 1327 v / _P f

. Gustav-Freytag-Strasse 25

Dipl.-Phys. Klaus SeifFert * ^{(06121) 3727i0}

^{r J} Telegram address: WILLPATENT

PATENT LAWYERS
Docket 5186

Harris-Intertype Corporation

55 Public Square Cleveland, Ohio 44113, USA

CHARACTER DISTRIBUTION SYSTEM FOR LIGHTING Priority from June 26th, 1970 in USA, Ser.No. 50025

The present invention relates to high speed photocomposition machines the type in which characters are used for the formation of lines from fonts of input selection codes are selected and image carrier light rays of the individual characters in an order to different positions directed onto a photosensitive surface such as photographic film or photographic paper. Various arrangements for directing the image carrier light beams at precise positions in successive order for distribution of the images formed on the photosensitive surface have been taken. This includes moving ones Film trolleys and transmitting reflector systems. These well-known Arrangements, to a large extent, form a major limitation on the overall speed and capability of the facility,

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Postal check. ' Frankfurt / Mitn 67 «Bank. Dresdner Bank AG. Wiesbaden. Account no. Ϊ74807

primarily due to the inertia of the moving parts and consequently the speed limits the associated controls.

There are considerations for distributing characters on the photosensitive surface by using rotatable reflective bodies, such as a mirror, have been employed at different angular positions is moved and thus reflects the image carrier light rays to different areas of the photosensitive surface, to ensure the distribution of the characters.

U.S. Patent 1,175,685, issued March 14, 1916

the
discloses a system in which the photosensitive surface is fixed in a flat image plane and a movable optical system in conjunction with an angularly moving mirror is connected to the appropriate

to keep the focus of the character images. Other

Considerations have been given in using it

-en

of angularly movable or rotatable mirrors or reflectors in which the film is arranged along an arc which has the center of rotation of the mirror as its focal point, but this caused some distortion of the character images as they are on the photosensitive Surface can be focused along a short arc rather than over a flat plane. Furthermore will precise position control of an angularly movable

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Member guaranteed by the fact! that no Waving fence will increase considerably as the beam continues deviates from the zentzmra when a flat film is used.

According to the present invention, sequential Image carrier light rays of the characters for education of lines of pleadingsi by a known per se Plant generated and the size of the images can be controlled by known means. The path of the image carrier light rays is directed through the collimator lens system (in some cases part of the measurement control) that directs the image carrier beam into parallel beams and the directed beam becomes a rotating reflector, e.g. a mirror, directed. The angular position of the reflector is controlled by a servomotor system that controls the Mirror in selected different angular positions with the accuracy required for the quality of the light setting. The servo motor is operated according to the image width information which is derived in selection of the character from a width memory and a point-dimension multiplier will. The directed rays are thus reflected against the precise preselected locations, and one The scanning and refocusing lens arrangement takes these rays from the rotatable reflector at the different angular positions and directs the rays onto the photosensitive surface. This surface, e.g. a photographic one Film, or a photographic paper, is in one Fastened image plane, and the scanning lens arrangement focus-

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sizes the image carrier rays in this plane _} in order to form successive, suitably sized images of the individual characters in the appropriate order.

The scanning lens thus has ₉ compensates for a specific construction of the the error or distortion of the image at the extreme WinkeIstellungen of the rotatable reflector after each side of a center position in which of these reflected beams, the photo-sensitive surface would intersect at right angles "The scanning lens has also ₉ built into it, to compensate for changes in focus due to increasing length of the optical path when the light rays intersect the photosensitive surface at angles less than ° \ 0 on both ends of the compound lines. provides the necessary compensation or the necessary compensation for errors and / or changes in the focal point as a result of deflection of the light beam from the direct right-angled intersection with the image plane.

The angular position of the reflective member is determined by controlled by a servo system, which responds to direct address information relating to the desired location this member belongs when each character image is projected. Am a uniform selection code for everyone

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Chinese character is also used to indicate the relative width that character from a memory: to make out. This Memorjt is loaded according to the brief to be used. The relative width is then multiplied by the point setting factor, which represents the enlargement or reduction of the image in the optical system, and represents the product the actual character width.

These width values are collected in a register when the characters are photographed. Thus represents the sum in this register is the position that the reflective member will reach for the next character should. A servo motor controls the position of the reflective member by receiving its input from a D / A converter, which is driven by the information in the register. The servo motor also drives a position encoder, which is connected to the servo control system for the return of the position code information. Thus, the reflective Limb moved directly from one position to the next by addressing it and precisely positioned at all times brought when the characters are being photographed.

The encoder has the ability to represent every possible position by uniform address code - at a small one Fraction, of a cicero (pica). Thus, the character distribution servo can as a direct response control

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are characterized, in contrast to known devices, use the stepper motors that only move their next desired position from the previous posi- = add or achieve tion. Therefore, cumulative distribution errors do not occur in the present invention on. If an error occurs due to the noise of a somewhat incorrect code, this has no effect on the following positions, as long as the output distribution register precisely calculates or adds up the products of the selection and the measure multipliers.

The main object of the present invention is therefore to create a new character distribution system and the control of a photocomposition machine, in which light parts of small inertia are precisely positioned by a servo system with a direct response position control and direct position response feedback with the time between character projections being minimal is kept and still a typographical or distribution Book printing quality is achieved.

Further advantages, features and possible applications of the present invention emerge from the following description in connection with the drawings. Show it:

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Fig. 1 is a schematic diagram of the photocomposing machine and its character distribution apparatus according to the invention, along with block diagram representations the controls for this,

Fig. 2 is a broken view of the typical character script disk that can be used in the device shown in Fig. 1, wherein the character A ^ option code is shown, the used in conjunction with character selection and projection equipment, and

Fig. 3 is a more detailed block diagram of the distribution servo. system.

The projection system for the character images has a continuously rotating character writing disc 10, which may be of the type shown in U.S. Patent 3,223,017, although the character pulp information continued in this particular embodiment can be. As shown in Fig. 2, the disc has at least two font circles 11 and 12, each of which has a complete font, one of which is different from the other, as a transparency through an opaque background. The character selection code, the one for each character in the font

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or in the font gleiefo. is »is in a separate zone 14. Further individual considerations the selection code and its use are described in U.S. Patent 3,059,219.

The selection code in zone 14 works with a pair Photocells I5 together and with cooperating light sources 16 for generating character selection pulses, which are directed to * selection circles 18, which in turn control a light flash control unit 20. This unit drives a high-speed flash lamp 22 (or equivalent spark gap) which produces an intense Light beam is generated with a short duration of the order of a microsecond. This light runs through them Typesetting selection prisms 25 on each side of the Disk 10 arranged «ÖB <8, and goes out of these prisms along an optical path 26 common to the successively linked images. details the construction and operation of the typesetting prism assembly are disclosed in U.S. Patent No. 3,099,9J + 5.

The image carrier light beams then pass through one of several sieve or sorting lenses 28 which, for example, are in one Turret 29 are carried so that each selected Lens can be moved into the optical path and thus changes the dimension of the resulting image. Alternatively adjustable character sorting lenses can be used

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will. In any case, the sorting lens in the operative position produces a real image of the character with a field lens 30ι the essential and effective collects the light rays for the further activity of the optical system. The image carrier rays run from the field lens 30 to a reflector system shown schematically at 32, in which the light is directed back if necessary. This system can have multi-reflective prisms Forms surfaces for aligning the characters, if necessary, but for the sake of simplicity only a single reflection surface is shown.

The light beams then travel to a collimator lens system 35. This collimator or alignment lens preferably has some adjustment of its local length which is sufficient for initial setting and precise focusing. But after this adjustment is done, the collimator lens is normally not adjusted any further. The directional light rays emitted by the collimator lens 35 are directed onto a rotatable reflector or mirror 40 which is attached to the ¥ elle 42 of a servo motor kh which functions as a device for selectively changing the angle position of the reflection of the collimator lens. This directs the aligned light beams to different parts of a photosensitive surface k5, which can be, for example, a photographic film or photographic paper with a feed roller k6 , which is a pick-up roller 47

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runs, under the control or control of a motor k8 j which works as a guide or line distribution control for the distribution of successive lines of the composition or the brief. The Heflektor ^ O directs the light to the plane of the photosensitive material k $ in such a manner that the center of a f in the material h5 to forming line in a position at right angles to the light beam coming from the reflector kO. Thus the reflector shifts the rays on either side of this middle path.

Between the reflector ^ O and that of the location of the photosensitive Material 45 formed image plane is a scanning or refocusing lens 5 ° is provided, which in more effective Way, the directed light rays are focused and thus a real image at the image plane and on the photo-. sensitive material. At the same time, this scanning lens sees compensation or equalization for the angular position of the light rays that hit the photosensitive surface at a certain angle less than 90 impinging when the light rays are about to hit off-center on any side. The further the rays of light are shifted in any direction the more acute this angle becomes,

and in a normal optical system this would blur the images due to the change in the optical path as well as a distortion of the image, whereby the writing

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character image tries to get wider when it is of the Center marker is moved further.

The scanning lens 50 thus functions as a passive element which provides appropriate focus, dimensions and spacing of the character images while allowing the photosensitive material to be maintained in one plane. This scanning lens has a special shape and is described in more detail elsewhere (Docket 51 & 5 » P 21 21 O98.O),

Thus, in this installation or in this system, the only moving member for distributing the characters when assembling an entire line is the relatively light mirror or reflective body with little inertia . With the servo motor kh it is possible to achieve the necessary angular movements and the adjustment of the mirror 40 at very high speeds and with an accuracy which is acceptable for quality letterpress samples.

Various controls and devices can be used to select characters to create adjusted or excluded composition lines. For example, the selection circuits 18 may be of the type described in US Patent 3,339 Λ70 and type shown, _s dai 5c on September I967 was spent. These circuits are written via a

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character selector 55 controlled, the character codes from a line memory or register 60. This memory is preferably divided into parts I and II, such that part of a home or photography activity can control while the other part is being loaded with information for the next line, and vice versa.

A reading device or reader 62 for short, which can be a conventional paper tape reader or an equivalent device for processing input code information, is connected to an input register 63 for the transmission of the character identification and the control codes. The reader is alternatively also connected to enter relative width codes into a character width memory 6k into which all uniform typographical or letterpress widths for the various characters on the writing disk 10 are entered. A point or position multiplier 65 takes the width information for each character from the width memory "6k, multiplied by the point measure, which is a factor related to the optical dimensional change, which is applied by the selected lens 28, and transmits the product to an adjustment or Excluding computer 68. These products are summed in the computer, subtracted from a prescribed length of line which is preset in the computer, and the difference is made below the

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Number of interword spaces in the line divided. Each remainder of this division is selected later in Placed between word spaces, generally according to that in U.S. Patent No. 3339-470 described system.

The resulting figure or number is an absolute adjusted interword spacing or distribution value that must be used for each interword spacing when creating the corresponding line on the film. This value is stored at an output 66, preferably as the aforementioned difference and the number of interword spaces in the line, so that the division and arrangement of each remainder can take place when the value is required for an adjusted inter-value space. This is transferred to a room status register 70 via an input T \ from the adjusting computer.

After a line is prepared in a part of the line memory 60, that part is transferred to an output path and the line is photographed. Meanwhile, the reader 62 feeds the information for the next line into the input register 63 and this information is transferred to the other part of the line memory while the character widths are made out by the memory 6k

and the justification evaluation will proceed for that next line. _ 14 _

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When the line is photographed, the character identification codes are read one by one from the portion of the line memory 60 which is in the exit path or state. These are directed over the cable Jh to the character selector 55 and also back to the width memory, where the relative width is again determined Distance state register 70 is added.

Thus, the value stored in register 70 represents or Code number the desired position of the reflector ^ O at the point in time at which the next character has to be photographed or mapped. When a When the character is photographed, it becomes actual Width is determined by the above process, and the change in output register 70 is made via cable 78 transferred to the mirror servo control 80, which immediately begins moving the mirror to the next position, as from the actual location code in the distance status register 70 is identified or established.

A sub-schematic of the controller 80 is shown in FIG. The information from register 7 ° becomes binary

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Subtraction unit 82 out. This linearity effectively subtracts the actual position code information from an optical shaft encoder 85 from your desired location code in the register TO , 6 minutes of arc, and the binary subtractor has a similar capacity.

The output of the subtractor unit 82 becomes a logical one Circle 87, which converts the information into a more suitable form for digital-to-analog conversion and also extracts the information indicating that the spacing or distribution activity is complete is. This latter information is sent to the detector circuit 88, which in turn has one Output is generated indicating that the photography or whatever activity ^ by the next code in the memory 60 is required - can progress. The output from the logic circuit also functions as a hold signal which is passed through line 89 to the Flash control unit 20 is sent to prevent its operation until the dispensing or spacing is completed is.

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The converted digital information from logic circuit 87 is sent to a digital-to-analog converter ^ 0 , and its analog output is sent to a preamplifier and compensation circuit 92, which feeds the gain obtained for static or dynamic operation of the servo system and stable, closed loop operation ensures. The output from this circuit is for the force amplifier 9h _t which in typical VeIse a gain on the order of 20 V / V. and which drives the servo motor kk to rotate the reflecting member * {0 and the encoder 85. A typical type of motor is a permanent magnet, low inertia DC motor delivering 2370 gx cm (30 ounce inches) of torque, available from Honeywell Manufacturing Company as type HSM-30.

The entire system is under the control of a treatment unit 95 which sets the time for the various Controls activities and sends suitable switching and control signals to the reader, input register, memory * to the To direct outputs of amplifier 65 to the appropriate location, start and stop adjustment computer 68, and if necessary the distance information leads to register 70. The treatment unit 95 can also provide suitable distance information for the master motor 48 for line spacing and provide for other film funding requirements.

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The preferred embodiment described above can be varied in various ways without departing from the scope of the invention. For example, the encoder 85 may be of a type that only transmits pulses in accordance with the movement of the encoder. In this case the mirror servo would include a counter driven by the encoder which operates to collect a position code to be compared with the location code derived from the distance status register. Such an arrangement would require the need for an extra counter in the servo control and somewhat more complicated code comparison circuitry, but on the other hand the encoder itself would be of a somewhat simpler type compare in order to achieve the desired position of the working member, e.g. the mirror or reflective member kO.

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Claims (1)

Claims (λ .) Phototypesetting machine with a character projection systemj the image carrier light beams form t _f a photosensitive material on which the images are recorded to form lines of the font or composition, and a distributor or a spacer device for the effective arrangement of the images the photosensitive material, thereby forming words and intermediate words composing aligned lines, characterized by a position control system having a register for storing a code identifying the location of the next character image to be formed in a line, a servo motor included in the distributor which is connected to the position control system in order to produce a variable distribution movement in accordance with the location codes in the control system, a position encoder driven by the servomotor for generating uniform codes for a number of differential servomotor locations upon reaching n designated locations within the boundaries of a line of composition, and a return control from the encoder to the position control system. BAD ORiGINAL 109853/1362 Distributor or spacer device for lighting Claim 1, characterized in that the distributor one driven by the servomotor rotatable Nef .1 ektieinrichtung and the encoder a identifying the angular position of the reflecting device Output generated. 3 · distributor for lighting according to claim 1, characterized through a memory for storing character identification codes for a line from SohrJftzeiehfn, a meter operated by the identification codes that drives the projection system to record characters which to form in a suitable sequence, a character width iiiiicniorjj. and means in operative communication with the selector for adding an appropriate one Wide inverts to the register, causing the servo motor advances to the correct position for the placement of the next character image. H. A photocomposing machine having a character projecting system for forming image carrier light beams, a photosensitive material on which the images are recorded to form lines of a composition, a distributor member which efficiently erects the images on the photosensitive material to form pre-tones and interword spaces, which 109853/1362 BATH 213157A HO Assemble lines of a composition, and a device for generating digital codes, which the Represent the distance from each character image and the distance assigned to the interword spaces is taken, characterized by a position control system with a register receiving the digital codes when the individual character images in the line wherein the register effectively sums the digital codes into a location code, one driving the distributor member or the spacer device Servo motor to one according to the location codes in the register corresponding ^ to produce variable distribution movement, a position encoder driven by the servo motor, 'the Uniform Dxgxtalpositxonskodes for a number of aiffentialen distributor member positions upon reaching designated locations within the boundaries of a composition line, outputs a subtraction circuit that extracts the codes from the register and the encoder receives and compares and effectively generates a difference signal, a digital to analog converter for receiving the difference signal and creating one corresponding analog output for driving the servo motor and a detector circuit, also responsive to the difference signal, for indicating the coicide between the location codes and the position codes to indicate the completion of a distribution or spacing activity. 109853/1362 - 21 - ORIGINAL BATHROOM 5 · Light typesetting machine with a character projection system for the formation of image carrier light rays, a photo-sensitive material on which the images for Formation of lines of a composition'-be recorded, a distributor member for efficiently distributing the images on the photosensitive material to form voids and interword spacing for composing lines of composition and a device for generating digital codes, which represent the distance occupied by each character image and the distance taken by belongs to interword spacing, characterized by a position control system with a digital code recording Register when the individual character images are formed in the line, with the register in effectively sums the digital codes into a location code which drives the spacer or distribution member Servomotor to produce a variable distribution movement according to the location codes in the register position encoder driven by the servo motor to generate digital position codes for a number of differential distribution link positions upon reaching certain positions within the boundaries of a composition line, a subtraction circuit for comparing the codes from the register and that from the encoder generated codes and to generate a difference signal, a Bigits-lanalogumwandlsr to record the Difference signal and provision of a corresponding analog 109853/1362 - 22 - BATH ORIGINAL logen output to drive the servo motor and a detector circuit, which also responds to the difference - ■ - signal responds to display the coincidence between the location codes and the position codes, thereby completing the distribution activity is displayed. 6. light setting machine according to claim 5 »characterized in that the distribution member is a rotatable Re-" flektorgLied is the one for the assumption of uniform Tfinkelpositionen under the control of the servo motor and that a restraint control connection from the position control system to the character projection system is provided to prevent the projection of the character image while the reflective Member is moved to the next position. 7 · Light setting machine according to claim 6, characterized in, that the encoder is an optical shaft encoder which is rotatable in unison with the reflector member. 8. light setting machine according to claim 5 »characterized by a device for generating distribution codes with a memori for storing relative Latitude codes for each character and a point gauge to accommodate the latitude codes from the memori. and for sending actual Bj_ldwidth codes to the register. 109853/1362 BAD ORlGfNAL